(a(i))[2]
From Fig. 2.1, calculate the initial rate of reaction in $\text{cm}^3\ \text{s}^{-1}$. Show the steps in your calculation.
(a(ii))[3]
Describe how the volume of oxygen collected changes in Fig. 2.1.
(ii)[3]
Explain how the volume of oxygen collected changes as shown in Fig. 2.1.
(b)[4]
Use the information in Fig. 2.2 to explain how copper ions affect the action of an enzyme, such as catalase.
(c)[3]
Enzyme molecules inside cells eventually cease functioning and are degraded. Outline how cells replace the enzymes that have been broken down.